Improvement in car-springs



JJLBLANDQ CarASpringr.

vNo. 111,127.

` Patented'Jan. `24, 1871.

versus gow-umomrlen. wAs

dtted tiene @anni mijn.

lJAMES' LnLAnn, orV SPRINGFIELD, MASSACHUSETTS.

Letters Patent No. 111,127, 'dated January 24 1871.

IMPROVEMENT IN CAR-SPRINGS.

The Schedule referred to in these LettersrPtent and making partof the same.

My invention consists in forming a car-spring of two or more peculiarly-constructed hollow cylinders of steel, arranged one within the other, so that a weight bearing uponfone overcomes its resistance be-v fore encountering the elasticity of the next, 'and this graduation is effected by decreasing the strength of the springs upward.

l'lhe object of -my invention is to forni a car-spring that occupies little space, and that can be made at will to yield and return any distance, or be made so strong in their'st place that no Weight that will be brought to bear can take up all its spring.

. AG'eiwral Description. The peculiar construction of each 4spring is as fol- A hollow` steel cylinder is slit in one of its sides, as shown in Figure-I. It is then warped or bent so that one corner at the slit fallsbelowthe other.

Thiswarpingis done when the shell is heated, so that when cool it would return to'its first shape if pressed down untilits top edges were in a plane.

Each cylinder-spring is proyided with a liange,'b, excepting the lowest, which,` not.being required to catchl upon any other, but only to hold the-others, has none. l

Figure II shows thelmanner of arranging the springs within each other, the slit in the spring B being opposite a point on the spring A; directlyopposite Iits own' slit,and so on, as many springs as may he used. Lhisis shown in Fig. II, where it will be seen that, while the flange of a lower corner ot' a spring rests on the spring beneath, the flange of the upper corner of the same spring supports the spring above, and it will be evident that the spring I) will have its corner L depressed under a weight iiush with its othercorner S before the weight will commence to bear down the corner of the spring O. This'wuld vbetlie case were they all of the-same thickness; but VI. graduate the thickness of each spring, sothat an easy motion is obtained for passenger-cars, while a spring is ob 'Y tained to meet all the :requirements of a freight-car, or of a tender, where a powerful spring'with little play is needed, so that little motion is'given to the water within the tender,`.and, at the same time. suliicient to prevent any bumping.

The slits in the sides of the spring-cylinders are made wide enough-to enable the spring to be slightly compressed when inserted within another, so that the lateral spring in each piece holdsjit in place and'prei vents its position from being relatiyelylchanged.

' In applying my spring it may be placed in a box on the axle, or simply over a 4stud attached to the car axle box. Y

In the volute spring the weight comes mostly upon. Y

the center, anda comparatively small portion ot' the' spring upon each side of the center, where it generally portion of the spring,'and the Spring Vnow in use, con- 1 sisting of a succession oi' spiral springs within each i' other, canbe made in a small space, ot' only a limited strength, .and when they bump from overweight` the ber of the steel is destroyed. v

But in my spring, by regulating the thickness of the cylinders, their height and the degree ofdeiiection ofthe corners of each one from the plane their anges were in originally, a graduated spring is made that meets every requirement.

Claim.

VVha-t I claim as' myinvention is- Acar-spring, constructed of the slit cylindelsA B A G D, Snc., having the flanges b, and arranged in the manner and for the purpose shown and'described. JAMES LELAND. l

Witnesses:

L. A. TIFF'r, 1t. F. HYDE. 

